Hi i have just started having problems with my 99 techno 250 at low revs it will run fine one minuite and the next i can feel the engine knocking and backfiring . i replaced the plug and put new fuel in it ran ok untill i put it through the gears and built some speed up after it started playing up again please help me.

This could be a lean condition due to fuel flow /starvation issues, water in float bowl, shorting kill button, loose electrical connections to coil or module, poor plug cap connection to plug lead, or lastly the dreaded ignition module failure. Don't suppose you have a friend with another similar Beta you could try swapping parts with. The knocking and backfire most likely are resulting from errattic spark timing. Hook up a timing light and run it up to farting rpm and you will observe the timing is jumping all over the place. If it is, you can safely assume it's a spark related problem. Next job should be to ohm check the stator. Many months ago I posted the ohms specs for the stator. Maybe you could still find them in the archives. Once the stator is verified good, it would be time to take the financial gamble and buy a new ignition module. Good luck. Jay

Jay did you leave the ohm readings in the Beta pages or mechanical i cant find them ? does any one else know?

O.K. it appears that it was over a year ago and it has dropped off the back end of this bulletin board. It was on "Beta". The way I remember this is, there are two black with white stripe wires to the lower unit that should read about 500 ohms to ground. The white trigger wire should read about 120 ohms. The black wire, I don't know what it's for. I had no useful readings on it. This is from memory. Check it and see if this is right. Jay

Also pull the flywheel and check the woodruff key that holds it in place on the crankshaft.

thanks for that i am off to sunny wales for a week now will try your ideas when i get back

Edited August 27, 200421 yr by badass76

I am the proud owner of a correctly running Techno, i purchased a new ignition module and it runs perfect now. can you recomend what lubrication i should use in the gearbox and how much and how to set up my suspension

Thanks again

Paul Neville

in your gearbox use pj1 light clutch tunner sae 80w http://www.bvm-moto.co.uk/oilsetc.htm#pj1

and for the suspension set it up what feels right to you loads of people have suposedly set my suspension properly for trials and and it does not feal right just dont have it real stiff keep it soft

Beta boy how do you set up your air mixture screw

dunno never needed to do it so dont have a clue

betaboy have you ever had a problem getting on to the scottish trials site where you got your clothing from

i didn't get my stuff from scotish trial i got them from www.bvm-moto.com

1. cause they are cheap

2.cause there is a 20% on all hebo clothing

3.cause they allways get it to me the next day

and i do have trouble getting onto the english version of scotish trial it is real anoying